Just had a reply from contact at Paymark to your question including ability to turn your phone into the ability to take payment… see below

Craig, this is the service offering from us for level 3 businesses:
https://www.paymark.co.nz/cardless-eftpos-oe

Essentially merchants go sign up themselves (takes 10 min) and they can log into our web portal to request payments at a distance/over the phone.

As soon as we are clear around the rules of level 3 payments using eftpos terminals we would be letting our businesses know what the santisation procedures would be. Will share with you too!